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Dissertations / Theses on the topic 'Biological pest control'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Hartfield, Christopher Mark. "Biological control of aphids on plum." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287493.

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2

Chang, Gary C. "Ecological interaction among natural enemies and its consequences for biological control /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/5205.

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3

Begum, Mahmuda. "Habitat manipulation to enhance biological control of lightbrown apple moth (Epiphyas postvittana) /." Connect to full text, 2004. http://hdl.handle.net/2123/690.

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4

Wilson, Michael John. "A nematode parasite for biological control of slugs." Thesis, University of Bristol, 1992. http://hdl.handle.net/1983/531bec1a-d998-4369-abbd-47c8c69e676c.

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5

Baker, Jeanine. "Factors affecting the establishment of a classical biological control agent, the horehound plume moth (Wheeleria spilodactylus) in South Australia." Title page, summary and contents only, 2002. http://web4.library.adelaide.edu.au/theses/09PH/09phb1677.pdf.

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Includes bibliographical references (leaves 168-198) The horehound plume moth (Wheeleria spilodactylus Curits), an agent introduced to control the invasive weed horehound (Murrubium vulgare L.), was used as a model system to investigate factors believed to influence the successful establishment of an introduced natural enemy. Retrospectively tests the use of generic population viability analysis and decision making tools for determining optimal release strategies for the horehound plume moth in South Australia and to compare outcomes with the emprical data collected during the course of this p

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6

Mdlangu, Thabisa Lynette Honey. "Influence of mite predation on the efficacy of the gall midge Dasineura sp. as a biocontrol agent of Australian myrtle Leptospermum laevigatum (Myrtaceae) in South Africa." Thesis, University of Fort Hare, 2010. http://hdl.handle.net/10353/272.

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Dasineura sp. is a gall forming midge that was introduced into South Africa for the biocontrol of the Australian myrtle, Leptospermum laevigatum. It causes galls on both the vegetative and reproductive buds of the plant. Although Dasineura sp. was initially regarded as a potentially successful agent, galling up to 99 percent of the buds of the host plant, it has been preyed on by native opportunistic mites, which caused a decline in the performance of the midge as a biocontrol agent of L. laevigatum. This raised a concern about whether this fly will be able to perform effectively in the presen

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7

Alfaro, Lemus Ana Lilia. "Factors influencing the control of citrophilous mealybug Pseudococcus calceolarie (Maskell) by Coccophagus gurneyi Compere in the Riverland of South Australia." Title page, contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09IM/09iml562.pdf.

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Includes bibliographical references (leaves 102-114) The highly successful biological control of the citrophilous mealybug Pseudococcus calceolarie (Maskell) (CM) by the parasitic wasp Coccophagus gurneyi Compere in several countries led to the release of this parasitoid in the Riverland of South Australia as part of an integrated pest management program. However CM has not been successfully controlled in this region. The results of this study may help to explain the lack of effective biological control of CM in Riverland citrus.

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8

Edwards, S. "Biological control of Botrytis cinerea by Bacillus brevis on protected Chinese cabbage." Thesis, University of Aberdeen, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262334.

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The activity of <i>Bacillus brevis</i> Nagano and the antibiotic it produces, gramicidin S, against the polyphagous plant pathogen, <i>Botrytis cinerea</i> was studied <i>in vitro</i>. Both germination and growth of <i>B. cinerea</i> were sensitive to the antibiotic although germination was the more sensitive. Sensitivity towards the antibiotic varied with cultural conditions. Treatment of <i>B. cinerea</i> conidia with high levels of gramicidin S caused massive release of cellular ATP indicating membrane disrupton as a primary mode of action. Activity of gramicidin S against conidia of <i>B.

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9

Goble, Tarryn Anne. "Investigation of entomopathogenic fungi for control of false codling moth, Thaumatotibia leucotrata, Mediterranean fruit fly, Ceratitis capitata and Natal fruit fly, C. rosa in South African citrus." Thesis, Rhodes University, 2010. http://hdl.handle.net/10962/d1005409.

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The biology of key citrus pests Thaumatotibia leucotreta Meyrick (Lepidoptera: Tortricidae), Ceratitis capitata Wiedemann (Diptera: Tephritidae) and Ceratitis rosa Karsch (Diptera: Tephritidae) includes their dropping from host plants to pupate in the soil below citrus trees. Since most EP fungi are soil-borne microorganisms, the development and formulation of alternative control strategies using these fungi as subterranean control agents, targeted at larvae and pupae in the soil, can potentially benefit existing IPM management of citrus in South Africa. Thus, a survey of occurrence of entomop

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10

Williams, Elizabeth Catherine. "Entomopathogenic nematodes as control agents of statutory insect pests." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265978.

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11

Cox, Mark David. "Factors affecting farmer acceptance of biological control within integrated pest management." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309163.

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12

Littlefield, Joanne. "Pest Control in the Urban Environment: Strategies Focus on Biological Methods." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2002. http://hdl.handle.net/10150/622244.

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13

Jones, Thomas Hefin. "Patterns of parasitism by Trybliographa rapae (Westw.), a cynipid parasitoid of the cabbage root fly." Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/7239.

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14

Ndlovu, Zibusiso. "Control of root knot nematodes (Meloidogyne Spp) using organic soil amendments and Pasteuria penetrans." Thesis, University of Reading, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320134.

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15

Bath, Abigail Jane. "Temperature and infection by Metarhizium spp. in the desert locust." Thesis, University of Bath, 1997. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245884.

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16

Gouge, Dawn Heather. "Biological control of sciarid flies (Diptera: Sciaridae) with entomopathogenic nematodes (Nematoda: Rhabditida), including reference to other diptera." Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385057.

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17

Ratnasinghe, Gamini. "Biological control of diamondback moth, Plutella xylostella (Lepidoptera: yponomeutidae) with entomopathogenic nematodes (Nematoda: rhabditida)." Thesis, University of Reading, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308035.

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18

Avila, Aristobulo Lopez. "A comparative study of four species of Encarsia (Hymenoptera: Aphelinidae) as potential control agents for Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae)." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/7478.

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19

Key, Georgina. "Cross-crop benefits : developing crop combinations to promote conservation biological pest control." Thesis, Lancaster University, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.658572.

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In agroecosystems, conservation biological control is often constrained by low availability of pollen and nectar. Although floral resources can be integrated into agricultural systems, this usually requires sacrifice of productive land. This thesis describes experiments which test the influence of floral resources provided by species which have marketable value in their own right as food or medicinal crops. Floralresource strips comprising such species were intercropped with Brassica crops at plot, field and commercial scales in replicated field experiments. The abundance and distribution of k

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20

Ruan, Chuan Qing. "Study on biological control of some pest thrips species using predatory insects." Göttingen Cuvillier, 2009. http://d-nb.info/997663006/04.

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21

Bogahawatte, Chitra N. L. "Glasshouse and field studies of diamondback moth Plutella xylostella (Lepidoptera: Yponomeutidae) on host plant resistance in Brassica and biological control." Thesis, University of Reading, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259920.

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22

Malek, Robert Nehme. "Novel Monitoring and Biological Control of Invasive Insect Pests." Doctoral thesis, Università degli studi di Trento, 2020. http://hdl.handle.net/11572/257781.

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Invasive species are alien to the ecosystem under consideration and cause economic or environmental damage or harm to human health. Two alien insects that fit this description are the brown marmorated stink bug, Halyomorpha halys and the spotted lanternfly, Lycorma delicatula. Both invaders are polyphagous pests that feed on a myriad of plant species and inflict severe crop losses. As sustainable control methods depend on the accurate monitoring of species’ invasion and involve the use of natural enemies, we addressed these two facets by exploring novel monitoring techniques and deciphering ho

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23

Profit, Michael Alastair. "Bionomic variation, oviposition strategy and larval competition in West African Bruchid populations." Thesis, Royal Holloway, University of London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266395.

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24

Jenkins, Nina E. "Studies on mass production and field efficacy of Metarhizium flavoviride for biological control of locusts and grasshoppers." Thesis, Cranfield University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309694.

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25

Malek, Robert Nehme. "Novel Monitoring and Biological Control of Invasive Insect Pests." Doctoral thesis, Università degli studi di Trento, 2020. http://hdl.handle.net/11572/257781.

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Invasive species are alien to the ecosystem under consideration and cause economic or environmental damage or harm to human health. Two alien insects that fit this description are the brown marmorated stink bug, Halyomorpha halys and the spotted lanternfly, Lycorma delicatula. Both invaders are polyphagous pests that feed on a myriad of plant species and inflict severe crop losses. As sustainable control methods depend on the accurate monitoring of species’ invasion and involve the use of natural enemies, we addressed these two facets by exploring novel monitoring techniques and deciphering ho

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26

Barnewall, Emily C., and University of Lethbridge Faculty of Arts and Science. "Plant-insect interactions between yellow toadflax, Linaria vulgaris, and a potential biocontrol agent, the gall-forming weevil, Rhinusa pilosa." Thesis, Lethbridge, Alta. : University of Lethbridge, Department of Biological Sciences, c2011, 2011. http://hdl.handle.net/10133/2618.

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Yellow toadflax, Linaria vulgaris (L.) Mill. (Plantaginaceae), is a non-native invasive plant. Rhinusa pilosa Germar (Coleoptera: Curculionidae) is a proposed biocontrol agent. Gall development by R. pilosa was described using histological methods and compared between plant populations from native and introduced ranges. Key stages of oviposition were isolated histologically to determine their importance in gall induction. Rhinusa pilosa galled and developed on four geographically distinct Canadian populations in a pre-release quarantine study. Low agent densities only negatively affected one p

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27

Valente, Carlos Manuel Ferreira. "Biological control of Gonipterus platensis: current status and new possibilities." Doctoral thesis, ISA/UL, 2018. http://hdl.handle.net/10400.5/17514.

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Doutoramento em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia<br>The Australian weevil Gonipterus platensis (Marelli) (Coleoptera: Curculionidae), commonly known as the Eucalyptus snout-beetle, is one of the main pests of eucalypts. Because this is a non-native species, classical biological control with natural enemies from its region of origin should be a viable control strategy. The introduction of the Australian parasitoid Anaphes nitens (Girault) (Hymenoptera: Mymaridae) has been the main method to control the pest worldwide. However, this natural ene

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28

Pretorius, Danielle. "Antimicrobial lipopeptide production by Bacillus spp. for post-harvest biocontrol." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96117.

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Thesis (MEng) -- Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: As overpopulation threatens the world’s ability to feed itself, food has become an invaluable resource. Unfortunately, almost a third of the food produced for human consumption is lost annually. Pests including insects, phytopathogens and weeds are responsible for more than a third of the annual major crop losses suffered around the world. The majority of current post-harvest control strategies employ synthetic agents. These compounds, however, have been found to be detrimental to the environment as well as human health, whi

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29

Fairbairn, Jonathan Paul. "Spatial and temporal dynamics of entomopathogenic nematodes." Thesis, University of Stirling, 2001. http://hdl.handle.net/1893/26685.

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The life-history and infection parameters of the entomopathogenic nematodes Steinernema feltiae (Filipjev)(Nematoda:Rhabditida) and Heterorhahditis megidis (Poinar, Jackson & Klein)(Nematoda:Rhabditida) were examined to provide specific details for the construction of mathematical SI models for biological control of soil insect pests. Laboratory experiments using the Greater Waxmoth, Galleria mellonella as the model host were undertaken to specifically examine the transmission behaviour of infective juvenile nematodes. The proportion of infective juveniles of S. feltiae which infected hosts wa

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30

Jenkins, Paul E. "Control of the grape berry moth, Paralobesia viteana, using reduced-risk insecticides, cultural controls, and conservation of natural enemies." Diss., Connect to online resource - MSU authorized users, 2006.

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31

Smith, Caroline Louise. "Biological control of root-knot nematodes (Meloidogyne spp.) with Pasteuria penetrans and Verticillium chlamydosporium in Costa Rica." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297317.

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32

Neethling, Jacob van der Westhuizen. "Biologiese beheer van plantparasitiese nematodes met die swam Paecilomyces lilacinus by aartappels, sitrus en wingerd." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53311.

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Thesis (MSc)--Stellenbosch University, 2003.<br>ENGLISH ABSTRACT: Paecilomyces Ii/acinus, ras 251 (geregistreer in terme van wet 36 van 1947 as Suid-Afrika se eerste natuurlike nematisiede en kommersieel beskikbaar as PI Plus) is as biologiese beheer agent getoets by aartappels en in geïntegreerde beheer programme by sitrus en wingerd teen respektiewelik Me/oidogyne species, Ty/enchu/us semipenetrans en verskeie ektoparasitiese nematodes. Die swam toon belofte vir die beheer van hierdie nematodes en het terselfdertyd nie 'n nadelige effek op nie-teiken, voordelige organismes in die grond

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33

Coombes, Candice Anne. "Entomopathogenic fungi for control of soil-borne life stages of false codling moth, Thaumatotibia leucotreta (Meyrick) (1912) (Lepidoptera: Tortricidae)." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1002057.

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False codling moth (FCM), Thaumatotibia leucotreta is an extremely important pest of citrus in South Africa and with the shift away from the use of chemicals, alternate control options are needed. One avenue of control which has only recently been investigated against the soil-borne life stages of FCM is the use of entomopathogenic fungi (EPF). In 2009, 12 entomopathogenic fungal isolates collected from South African citrus orchards showed good control potential during laboratory conducted bioassays. The aim of this study was to further analyse the potential of these isolates through concentra

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34

Roy, Helen Elizabeth. "Interactions between aphid predators and the entomopathogenic fungus Erynia neoaphidis." Thesis, University of Nottingham, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362048.

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35

Saljoqu, Ahmad-Ur-Rahman. "Integrated management of potato aphid, Myzus persicae (Sulzer) in Pakistan." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284450.

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36

Carroll, Thea Henriette. "Quality of environmental impact assessment (EIA) reports on biological pest control / Thea Henriette Carroll." Thesis, North-West University, 2006. http://hdl.handle.net/10394/1695.

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Decision making regarding the release of biological control agents for invasive species such as lantana, Lantana camara, requires the consideration and evaluation of environmental impact assessment (EIA) reports by a competent authority. Although various biological control agents have been authorised for release into the environment for the control of lantana, the quality of the EIA reports that form the basis for decision making has never been evaluated. The evaluation of the quality of EIA reports on the release of biological control agents by means of an adapted Lee- Colley review package w

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37

Gómez, Marco Francesc. "Integrated Pest Management of Aphis spiraecola (Hemiptera: Aphididae) in clementines: enhancing its biological control." Doctoral thesis, Universitat Politècnica de València, 2015. http://hdl.handle.net/10251/53732.

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[EN] Aphis spiraecola Patch. (Hemiptera: Aphididae) is a key pest of clementines. Biological control of A. spiraecola is still poorly known and efforts were based on the use and conservation of parasitoids but it did not success. With all this said, the aims of this thesis were: i) to disentangle the reasons behind the low parasitism of A. spiraecola; ii) to determine when and how predators can control A. spiraecola populations; and, finally, iii) to evaluate whether a ground cover of Poaceae plants can enhance the biological control of this aphid in clementines by improving the establishment

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38

Ehsan-Ul-Haq. "Interaction of cultural control with biological control of rose grain aphid, Metopolophium dirhodum (Walker) (Aphididae: Hemiptera) on wheat : the potential of glasshouse simulations." Thesis, University of Reading, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387770.

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39

Mekonnen, Tadele Tefera, and Tadele Tefera. "Biological control potential of the spotted stem borer Chilo partellus (Swinhoe) (Lepidoptera: Crambidae) with the entomopathogenic fungi Beauveria bassiana and Metarhizium anisopliae." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/16063.

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Thesis (PhD (Agric))--University of Stellenbosch, 2004.<br>ENGLISH ABSTRACT: Biological control studies were conducted with isolates of entomopathogenic fungi Beauveria bassiana and Metarrhizium anisopliae from Ethiopia and South Africa against the spotted stem borer Chilo partellus. The study was conducted from April 2002 to April 2003, at the department of Entomology and Nematology, University of Stellenbosch, South Africa. The objectives were to screen these isolates for pathogenicity and to determine the susceptibility of different larval instars; to study the effect of temperature o

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40

Paliwal, Deepa. "Identification and characterisation of new aphid killing bacteria for use as biological pest control agents." Thesis, University of Reading, 2017. http://centaur.reading.ac.uk/78229/.

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Insecticide resistance and on-going legislation changes on the use of insecticides are likely to reduce their availability for use in agriculture; hence there is an urgent need to develop effective biological controls against these plant pests. Aphids are major insect pests of the agricultural and horticultural sectors. Recent work screened a range of phylloplane-residing bacteria for their ability to kill aphids and used alternative insect targets to determine host specificity. Tests with five other aphid genera indicated the bacteria were also able to kill them. However, the bacteria were ge

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41

Kariuki, Charles Wachira. "A new baculovirus isolate for the control of the Diamondback moth, Plutella Xylostella (L.) (Plutellidae:Lepidoptera) /." free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9821333.

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42

Lima, Fernanda Blauth de. "Secretômica de Trichoderma atroviride e Trichoderma harzianum frente a Guignardia e citricarpa, agente etiológico da Pinta Preta dos Citros." reponame:Repositório Institucional da UCS, 2016. https://repositorio.ucs.br/handle/11338/1141.

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Os agentes de controle biológico têm recebido grande reconhecimento, e o seu uso tem contribuído como um complemento ou substituição de agroquímicos. No entanto, existem poucos estudos sobre o controle biológico da Pinta Preta dos Citros, causada pelo fungo Guignardia citricarpa, o que impede o seu mercado in natura, além de prejudicar a sua exportação pelo uso intensivo de insumos químicos para controlar este patógeno. Os fungos do gênero Trichoderma são agentes de controle utilizados em todo o mundo contra vários fitopatógenos relevantes. Este estudo visou identificar proteínas extracelulare

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43

Smith, Ethan A. "Is everything connected? following the predators, pests, and plants within a no-till, western Montana agroecosystem /." CONNECT TO THIS TITLE ONLINE, 2006. http://etd.lib.umt.edu/theses/available/etd-12212006-142245/.

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44

Straub, Cory Severen. "Exploring the relationship between natural enemy biodiversity and herbivore suppression." Online access for everyone, 2006. http://www.dissertations.wsu.edu/Dissertations/Fall2006/c_straub_111306.pdf.

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45

Heystek, Fritz. "Laboratory and field host utilization by established biological control agents of Lantana camara L. in South Africa." Thesis, Rhodes University, 2006. http://eprints.ru.ac.za/255/.

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46

Kuhar, Thomas P. "Population dynamics, mortality factors, and pest status of alfalfa weevil in Virginia." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/26256.

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The alfalfa weevil, Hypera postica (Gyllenhal) (Coleoptera: Curculionidae), remains a serious pest in Virginia despite being under complete biological control in the northeastern U.S. In 1996, a survey of 187 alfalfa fields in Virginia was initiated to determine the current pest status of alfalfa weevil and incidence of natural enemies. Fields located in the Piedmont region of the state had significantly higher alfalfa weevil pressure than those in the Shenandoah Valley and southwestern region. The dominant natural enemy of alfalfa weevil larvae was the parasitoid, Bathyplectes anurus (Thom

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47

Paterson, Iain Douglas. "Biological control of Pereskia aculeata Miller (Cactaceae)." Thesis, Rhodes University, 2011. http://hdl.handle.net/10962/d1007653.

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Pereskia aculeata Miller (Cactaceae) is an environmental weed that is damaging to natural ecosystems in South Africa. The plant is native to Central and South America and was first recorded in South Africa in a botanical garden in 1858. In this thesis, research into the biological control of P. aculeata was conducted with the intention of improving the control of the weed. A pre-release study of the relationship between P. aculeata density and native plant biodiversity indicated that P. aculeata has a negative impact on native biodiversity. The native plant biodiversity associated with differe

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48

Sigfridsson, Sabine. "The role of midfield islets in pest control." Thesis, Stockholms universitet, Institutionen för naturgeografi och kvartärgeologi (INK), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-88404.

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During last century rising populations and changed market preferences have led to large structuralchanges in agriculture in the developed world. Most conventional cultivation methods involve theproduction of few monoculture crops within a homogenous landscape, where pesticides and inorganicfertilizers are used to increase yields. The cereal aphid Rhopalosiphum padi (L.) is a pest in cerealsresulting in large economic losses for farmers throughout Europe, and are currently removed withchemical pest control. However, the pesticides also affect existing ecosystem services like potentiallypest-con

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49

Seguni, Zuberi Singano Kombo. "Biology and control of Pheidole megacephala (Hymenoptera: Formicidae, Myrmicinae) especially in relation to use of Ocecophylla longinoda (Formicidae, Formininae) for biological control of Pseudoptheraptus wayi (Herteroptera: Coreidae) in Tanzanian coconut." Thesis, University of London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264338.

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50

Morse, Stephen. "The integration of partial plant resistance with biological control by an indigenous natural enemy complex in affecting populations of cowpea aphid (Aphis craccivora Koch)." Thesis, University of Reading, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.237839.

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